Stratum lucidum

Stratum lucidum – Definition

It is one of the layers of the epidermis that is constituted of a layer of dead skin cells. It is also known as the “Granular layer of the skin.”

Stratum lucidum – Etymology

The name of this integumentary structure is Latin in origin and stands for “clear layer.”

Stratum lucidum – Location

It is located within the epidermis, between two other epidermal layers Stratum corneum and Stratum granulosum. It is found only in those areas of the body, such as the soles or the palms, where the skin is thicker.

Stratum lucidum – Functions

This epidermal layer performs a number of functions:

It makes up the external layer of epidermis and is composed of dead cells of skin.

It provides the skin with the ability to stretch.

The presence of a type of protein in this layer is responsible for skin cell degeneration.

Due to its thickness, the layer reduces the effects of friction inside the skin – particularly in thick-skinned areas like the toes or palms.

It also makes the skin waterproof, an ability that gives it the name “Barrier layer of the skin.”

Stratum lucidum – Pictures

The images underneath provide a visual idea about how this layer looks like.